Got on this train last week and as soon as I sat down I noticed a strange almost throat singing-esque hum which I took to be a rather pleasant sounding mechanical fault, so I decided to record it on my phone.
After a moment or two I realized that it was actually a guy sat near the front of the carriage intermittently humming to himself. Which was a little odd.
As far as I can make out he is noticeable intermittently from 0:55 onwards.
Sorry about the shite sound quality and the fact you can barely hear him.
The Happiness Patrol (a sound and art thing that sometimes happens in some form or other. From Stockport, England) can be found at: